Thank you for the pointer to convertTypeToDict.

The (very complex) extend type is parsed as non array simple type.
Thus a call to "getText" on the whole result subtree gives this annoying result.

Here is the log file analysis on the call with the children of the Result node as argument:

<verbatim>
::WS::Utils::convertTypeToDict Client 1 domNode052AAEF0 tns1:MapServerInfo domNode052AB418 0
	 type def = {definition {Name {type xs:string comment {}} Description {type xs:string comment {}} FullExtent {type tns1:Envelope comment {}} Extent {type tns1:Envelope comment {}} SpatialReference {type tns1:SpatialReference comment {The spatial reference of the map (data frame).}} MapLayerInfos {type tns1:ArrayOfMapLayerInfo comment {}} BackgroundColor {type tns1:Color comment {}} Bookmarks {type tns1:ArrayOfMapServerBookmark comment {}} DefaultMapDescription {type tns1:MapDescription comment {}} Units {type tns1:esriUnits comment {The units for the map (data frame).}} SupportedImageReturnTypes {type tns1:esriImageReturnType comment {}} BackgroundSymbol {type tns1:FillSymbol comment {}} CopyrightText {type xs:string comment {}} StandaloneTableInfos {type tns1:ArrayOfStandaloneTableInfo comment {}} StandaloneTableDescriptions {type tns1:ArrayOfStandaloneTableDescription comment {}} FullTimeExtent {type tns1:TimeExtent comment {}} DefaultTimeStepInterval {type xs:double comment {}} DefaultTimeStepIntervalUnits {type tns1:esriTimeUnits comment {}} DefaultTimeWindow {type xs:double comment {}} SupportsDynamicLayers {type xs:boolean comment {}} HasLiveData {type xs:boolean comment {}} MinScale {type xs:double comment {}} MaxScale {type xs:double comment {}}} xns tns1 abstract false}
 	 XML of node is <Result xsi:type="tns:MapServerInfo">
     <Name>Layers</Name>
     <Description/>
     <FullExtent xsi:type="tns:EnvelopeN">
         <XMin>-8883833.3022622615</XMin>
         <YMin>4916395.3269803952</YMin>
         <XMax>-7973800.0204237271</XMax>
         <YMax>5632483.3843831643</YMax>
         <SpatialReference xsi:type="tns:ProjectedCoordinateSystem">
             <WKT>PROJCS["WGS_1984_Web_Mercator_Auxiliary_Sphere",GEOGCS["GCS_WGS_1984",DATUM["D_WGS_1984",SPHEROID["WGS_1984",6378137.0,298.257223563]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Mercator_Auxiliary_Sphere"],PARAMETER["False_Easting",0.0],PARAMETER["False_Northing",0.0],PARAMETER["Central_Meridian",0.0],PARAMETER["Standard_Parallel_1",0.0],PARAMETER["Auxiliary_Sphere_Type",0.0],UNIT["Meter",1.0],AUTHORITY["EPSG",3857]]</WKT>
             <XOrigin>-20037700</XOrigin>
             <YOrigin>-30241100</YOrigin>
             <XYScale>148923141.92838538</XYScale>
             <ZOrigin>-100000</ZOrigin>
             <ZScale>10000</ZScale>
             <MOrigin>-100000</MOrigin>
             <MScale>10000</MScale>
             <XYTolerance>0.001</XYTolerance>
             <ZTolerance>0.001</ZTolerance>
             <MTolerance>0.001</MTolerance>
             <HighPrecision>true</HighPrecision>
             <WKID>102100</WKID>
             <LatestWKID>3857</LatestWKID>
         </SpatialReference>
     </FullExtent>
*** snip ***

 	 partsList is {Name Description FullExtent Extent SpatialReference MapLayerInfos BackgroundColor Bookmarks DefaultMapDescription Units SupportedImageReturnTypes BackgroundSymbol CopyrightText StandaloneTableInfos StandaloneTableDescriptions FullTimeExtent DefaultTimeStepInterval DefaultTimeStepIntervalUnits DefaultTimeWindow SupportsDynamicLayers HasLiveData MinScale MaxScale}
 Type = {string} typeInfoList = {0 0}
 @3
 	partName Name partType xs:string xns tns1 typeInfoList 0 0
 Trying #1 domNode052AAEF0 selectNodes tns1:Name
 Trying #2 domNode052AAEF0 selectNodes tns1:Name
 Trying #3 domNode052AAEF0 selectNodes Name
 		 Found 1 Name

*** in ::WS::Utils::GetServiceTypeDef Client 1 xs:string

 Type = {string} typeInfoList = {0 0}
 @3
*** -> symple type: string
 	partName Description partType xs:string xns tns1 typeInfoList 0 0
 Trying #1 domNode052AAEF0 selectNodes tns1:Description
 Trying #2 domNode052AAEF0 selectNodes tns1:Description
 Trying #3 domNode052AAEF0 selectNodes Description
 		 Found 1 Description
*** here is the FullExtend run ***

*** in (::WS::Utils::GetServiceTypeDef Client 1 tns1:Envelope)

 Type = {tns1:Envelope} typeInfoList = {0 0}
 @2

*** Custom simple type
*** simpleTypes($mode=Client,$service=1,$type=tns1:Envelope) = {0 0}

*** utilities 1443
	partName FullExtent partType tns1:Envelope xns tns1 typeInfoList 0 0
 Trying #1 domNode052AAEF0 selectNodes tns1:FullExtent
 Trying #2 domNode052AAEF0 selectNodes tns1:FullExtent
 Trying #3 domNode052AAEF0 selectNodes FullExtent
*** utilities 1477
 		 Found 1 FullExtent
</verbatim>

With the type "0 0", it goes to a getText and thus to the strange result.

Now, the type should be non simple non array "1 0".
Then, we would get the single fields (or would get a chance to get it).